Custer County Idaho Fairgrounds Events
Custer County, Idaho, has a strong connection to ranching, livestock production, outdoor recreation, and small-town community events. The annual Custer County Fair brings these traditions together in Mackay, a small community in the Lost River Valley along U.S. Highway 93.
There is an important distinction for visitors: Custer County has fairgrounds in Mackay and a separate North Custer Rodeo Grounds facility near Challis. The annual county fair is held at the Mackay Fairgrounds, while the Challis venue supports rodeos and other equestrian activities.
Location and grounds
The Mackay fairgrounds are in the Mackay area of Custer County, Idaho, ZIP code 83251. The county’s fair board identifies approximately 2.72 acres of county-owned property in Mackay as the Custer County Fair Grounds. A separate 26-acre property near Challis is managed as the North Custer Rodeo Grounds.
Mackay can be reached via U.S. Highway 93, the main north–south route through the Lost River Valley. Visitors should confirm the precise entrance and parking arrangements before traveling, particularly when attending a scheduled competition.
Who manages the fair?
The Custer County Fair Board oversees the county’s fair-related property and helps organize the annual fair in coordination with University of Idaho Extension, local volunteers, youth organizations, and community members. The board is made up of volunteer members and does not maintain regular public office hours.
The fair is important locally because it gives young people a place to present livestock and other projects, allows residents to display practical skills, and brings ranching families, exhibitors, buyers, and spectators together.
Upcoming Events at Custer County Fairgrounds
The fair is the main annual event associated with the Mackay grounds. Its schedule can include livestock activities, open-class exhibits, horse-related events, a ranch rodeo, team roping, contests, and youth competitions. Exact activities vary by year, so visitors should use the current fair schedule rather than assume every event returns annually.
Seasonal event patterns
The county fair takes place in summer. Other livestock and 4-H preparations happen earlier in the year, including enrollment, project planning, animal preparation, and entry deadlines. The separate North Custer Rodeo Grounds near Challis is associated with rodeos, roping, barrel racing, and equestrian gatherings.
Not every event commonly found at a large fairground—such as demolition derbies, motocross meets, gun shows, or a large traveling carnival—is confirmed as a regular feature in Mackay. Check the specific year’s program before making plans around those activities.
How to find the latest schedule
The Custer County Fair Board’s public information page provides the annual schedule, open-class exhibit documents, entry forms, and information about events such as the ranch rodeo and team roping. University of Idaho Extension in Custer County is another useful contact for youth livestock and 4-H questions.
The 2026 Custer County Fair ran July 27 through August 1, 2026. Those dates have passed. The dates for the 2027 fair should be confirmed through the fair board when its new schedule is published.
Facility rentals and private events
Custer County provides separate applications for use of the county fairgrounds and the North Custer Rodeo Grounds. Anyone considering a private gathering, livestock-related activity, or organized event should ask the county about the correct property, permitted use, fees, insurance, availability, and cleanup requirements. Rental terms should not be assumed to be the same for both venues.
The County Fair Itself
Typical fair dates: Late July to early August
The Custer County Fair is held during the summer in Mackay. The 2026 edition took place July 27–August 1. As of October 2026, the 2027 dates have not been confirmed in the information available for this article.
Livestock, open-class exhibits, and contests
The fair’s program includes youth livestock activities and open-class competitions. The 2026 fair information included an open horse show, ranch rodeo, team roping, and a pie and cheesecake contest. The open-class program gives residents an opportunity to participate beyond livestock, although the exact categories and entry requirements should be checked in the current exhibit documents.
Depending on the year’s program, exhibitors should look for information about animal classes, project eligibility, check-in times, judging, and awards. Do not assume every livestock species or craft category will appear on every year’s schedule.
Carnival rides, food, and entertainment
A large traveling carnival, a particular number of rides, wristband prices, and daily midway hours could not be confirmed as standard features of the Mackay fair. Check the event schedule before traveling specifically for rides.
Visitors should also review the published program for concessions and food vendors. The confirmed 2026 activities included a pie and cheesecake contest, which gives the fair a home-cooking element alongside its agricultural and western events. Specific performers, grandstand acts, admission rates, and child or senior discounts should be verified for the year of the visit.
Facilities and Grounds
The Mackay fairgrounds occupy a relatively small county-owned property of approximately 2.72 acres. They should not be confused with the larger North Custer Rodeo Grounds near Challis.
Buildings and livestock areas
The county fair board maintains responsibility for fair-use property, and fair documents refer to an exhibit building and livestock-related activities. A verified public inventory of every permanent building, barn, arena seat, restroom, and commercial booth area was not available. Exhibitors who need a particular facility should contact the fair board or Extension office before arriving with animals or equipment.
Camping, parking, and accessibility
County meeting records have discussed RV reservations and camping connected with fairground use, but visitors should confirm current availability, fees, hookups, and reservation requirements directly with the county. Do not assume that every site has electrical service or that overnight parking is permitted during every event.
Mackay and the surrounding Lost River Valley have separate camping options, including the Mackay Reservoir recreation area north of town. These are alternatives for visitors who need overnight accommodation, not proof that a particular campsite is included with fair admission.
The available information does not confirm the fairgrounds’ parking capacity, ADA parking layout, accessible restroom provision, first-aid station, or ATM availability. Anyone with mobility or medical-access needs should check with the event organizers ahead of time.
Custer County Idaho Fairgrounds Events connect readers with searches for local fairs, agricultural displays, and community activities in central Idaho. Readers exploring north-central Idaho can continue with Clearwater County Idaho Fairgrounds Events to research regional exhibitions and community celebrations.
Vendor and Exhibitor Information
Commercial vendors
People interested in selling food, crafts, agricultural supplies, or other goods should ask the fair board whether vendor spaces are offered for the upcoming fair. Confirm the application process, booth dimensions, fees, setup hours, electrical access, insurance requirements, and deadlines before making arrangements.
A vendor application for another state’s Custer County Fair should not be used for the Idaho event. Make sure all forms and instructions specifically identify Custer County, Idaho.
Open-class and livestock entries
The fair board publishes open-class entry documents and other annual materials. Read the relevant year’s instructions carefully: different categories may have different deadlines, check-in times, judging procedures, and eligibility rules.
For youth project questions, the University of Idaho Extension office in Custer County can help families understand enrollment, project requirements, and fair participation.
Getting to Custer County Fairgrounds
Driving to Mackay
Mackay is served by U.S. Highway 93, which runs through the Lost River Valley. Visitors driving from Challis can travel south toward Mackay, while travelers from Arco can approach from the south on the same highway. Check current road conditions and confirm the fairgrounds entrance before departure, especially if towing a livestock trailer or RV.
The fairground property is in Mackay, not in Challis. The county seat is Challis, so visitors searching for directions should distinguish the Mackay fairgrounds from the North Custer Rodeo Grounds.
Public transportation or dedicated fair-week shuttles have not been confirmed. Ask organizers about designated parking, trailer access, drop-off arrangements, and traffic control for the specific event.
4-H and FFA at the Custer County Fair
Youth development is an important part of the Custer County Fair. University of Idaho Extension supports local 4-H programs, helping young people build practical skills through projects, club participation, mentoring, and public exhibitions.
4-H projects and FFA participation
Custer County 4-H offers a range of projects, with opportunities that can include livestock, horses, shooting sports, photography, food science, and other practical or creative interests. Project availability depends on local clubs, enrollment, and adult leaders.
The county fair board’s published information also identifies contacts associated with the Mackay and Challis FFA chapters. Families should confirm which chapters and project categories are participating in a given year’s fair.
Junior livestock sale
The Custer County 4-H and FFA Market Animal Sale gives buyers a way to support young livestock exhibitors. Buyers can purchase an eligible animal, contribute to a buyer pool, or provide an approved add-on contribution to a qualifying exhibitor’s project. The buyer pool helps participants who cannot purchase an entire animal individually by pooling support toward the difference between the purchase price and the floor price.
People planning to bid should contact University of Idaho Extension in Custer County for buyer registration and current sale instructions. Sale timing, eligibility, and payment arrangements should be checked against the annual schedule.
Special Events Beyond the Annual Fair
The county’s two fair-related venues serve different purposes. Mackay hosts the annual Custer County Fair, while the North Custer Rodeo Grounds at 615 Rod and Gun Club Loop, Challis, Idaho 83226, is associated with rodeos, roping, barrel racing, equestrian activities, and community gatherings.
The fair board’s annual documents have included ranch rodeo and team roping information, while county records also reference a Mackay mini rodeo and goat roping. These are useful leads for visitors seeking western sports, but event dates and recurrence should be confirmed rather than assumed.
Other activities—such as flea markets, gun shows, motocross, demolition derbies, or touring concerts—should not be treated as regular Mackay fairground events without a specific announcement.
History of Custer County Fairgrounds
The county’s fair board records identify the Mackay fairground property as county-owned land deeded for fair purposes in 1975. The separate North Custer Rodeo Grounds property near Challis was deeded in 1976. These dates establish the documented history of the county’s current fair-related properties, though they do not necessarily mark the beginning of every local fair or rodeo tradition.
The fair continues a rural tradition of bringing together agriculture, livestock education, local skills, and community participation. For young exhibitors, it is a chance to present projects and learn from judges and experienced producers. For livestock buyers, the market animal sale offers a direct way to support the next generation of local agricultural workers.
A detailed, verified year-by-year history of attendance records, famous visitors, cancellations, or major construction projects was not available. Specific historical claims should be checked against county archives and fair board records rather than repeated without documentation.
Frequently Asked Questions
When is the Custer County Fair in Idaho in 2027?
The 2027 dates were not confirmed in the available information. The 2026 fair ran July 27 through August 1. Check the current schedule issued by the Custer County Fair Board before arranging travel.
Where is Custer County Fairgrounds located?
The annual county fair is held in Mackay, Idaho, ZIP code 83251, near U.S. Highway 93. It is separate from the North Custer Rodeo Grounds near Challis.
What time does Custer County Fairgrounds open?
Opening hours depend on the event and the day’s schedule. Check the current fair program for gate times, exhibit hours, livestock check-in, and evening activities.
Is there camping at Custer County Fairgrounds?
Camping and RV arrangements have appeared in county fair board discussions, but current availability, fees, hookups, and reservation rules need confirmation. Visitors can also investigate camping options near Mackay Reservoir.
How do I enter livestock in the Custer County Fair?
Start by contacting University of Idaho Extension in Custer County or reviewing the current fair entry documents. Confirm enrollment requirements, animal eligibility, weigh-in times, deadlines, and sale rules before bringing livestock to the grounds.
Are dogs allowed at Custer County Fairgrounds?
A current general pet policy could not be confirmed. Ask the organizers before bringing a dog, and check for any separate rules governing service animals, livestock areas, or competition venues.
Where do I park at Custer County Fairgrounds?
Follow event-day instructions and signs in Mackay. Trailer parking, overflow parking, and accessible spaces should be confirmed with organizers because the available public information does not establish a universal parking plan.
How much does it cost to attend the Custer County Fair?
Current admission prices, discounts, and individual event charges were not confirmed. Check the annual schedule or contact the fair board for the applicable year’s fees.
Who do I contact about renting the fairgrounds?
Custer County provides applications for use of its fairgrounds and North Custer Rodeo Grounds. Contact the county to confirm which property is suitable, along with availability, fees, and permit requirements.
How can I become a 4-H member in Custer County?
Contact University of Idaho Extension in Custer County at 208-879-2344 or [email protected]. Staff can explain available clubs, projects, enrollment steps, and how young people can prepare for fair participation.
